Cochlea to categories: The spatiotemporal dynamics of semantic auditory representations.
Cochlea to categories: The spatiotemporal dynamics of semantic auditory representations.
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DOI：
10.1080/02643294.2022.2085085
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发表时间：
2021-10
影响因子：
3.4
通讯作者：
Teng, Santani
中科院分区：
文献类型：
--
作者：
Lowe, Matthew X.;Mohsenzadeh, Yalda;Lahner, Benjamin;Charest, Ian;Oliva, Aude;Teng, Santani
关键词：
听觉系统如何对自然声音进行表征和分类？在这里，我们应用多模态非侵入性成像表明，从声学到语义占主导地位的表示的时空进展是一致的混合和分布式分层处理方案。结合脑磁图（MEG）和功能性磁共振成像（fMRI）的反应，一个大的自然的声音，我们发现上级的时间响应被动听开始~55毫秒刺激后发病，蔓延到颞外皮层~100毫秒。早期地区区分的发病/峰值潜伏期比功能特性和整体的时间响应曲线。早期听觉主导的表征随着时间（~200 ms后）和空间（超出初级皮层）系统地趋向于语义类别主导。语义类别的代表性是空间特异性的：发声优先区分在颞叶和额叶的声音选择区域和梭状面区;场景和对象的声音区分在海马旁和内侧区。我们的研究结果是一致的，通过扩展的听觉处理层次编码的真实世界的事件，其中声学表示产生多个流专门的类别，包括通常被认为是视觉皮层的领域。
How does the auditory system represent and perceptually categorize natural sounds? Here we apply multimodal noninvasive imaging to show that the spatiotemporal progression from acoustic to semantically dominated representations is consistent with a mixed and distributed hierarchical processing scheme. Combining magnetoencephalography (MEG) and functional magnetic resonance imaging (fMRI) responses to a large set of naturalistic sounds, we found superior temporal responses to passive listening beginning ~55 ms post-stimulus onset, spreading to extratemporal cortices by ~100 ms. Early regions were distinguished less by onset/peak latency than by functional properties and overall temporal response profiles. Early acoustically-dominated representations trended systematically toward semantic category dominance over time (after ~200 ms) and space (beyond primary cortex). Semantic category representation was spatially specific: vocalizations were preferentially distinguished in temporal and frontal voice-selective regions and the fusiform face area; scene and object sounds were distinguished in parahippocampal and medial place areas. Our results are consistent with real-world events being coded via an extended auditory processing hierarchy, in which acoustic representations give rise to multiple streams specialized by category, including areas typically considered visual cortex.
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DOI：
10.1098/rstb.2016.0108
发表时间：
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影响因子：
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通讯作者：
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